CVE-2010-20112 Amlibweb NetOpacs webquery.dll Stack Buffer Overflow
A stack buffer overflow in Amlib NetOpacs allows remote attackers to execute arbitrary code via crafted HTTP GET parameters.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2010-20112?
CVE-2010-20112 is a critical memory corruption vulnerability in Amlibweb Library Management System, published on 21 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Amlib’s NetOpacs webquery.dll contains a stack-based buffer overflow vulnerability triggered by improper handling of HTTP GET parameters. Specifically, the application fails to enforce bounds on input supplied to the app parameter, allowing excessive data to overwrite memory structures including the Structured Exception Handler (SEH). Additionally, malformed parameter names followed by an equals sign may result in unintended control flow behavior. This vulnerability is exposed through IIS and affects legacy Windows deployments
Weakness: CWE-121
Which versions are affected by CVE-2010-20112?
How do I fix CVE-2010-20112?
No fix has been published for CVE-2010-20112 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2010-20112 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-20112 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-4mw2-xrgp-grww.